代PLC不仅有逻辑运算、计时、计数、顺序控制等功能，还具有数字和模拟量的输入输出、功率驱动、通信、人机对话、自检、记录显示等功能。既可控制一台生产机械、一条生产线，又可控制一个生产过程
目前，大多数PLC仍采用继电控制形式的“梯形图编程方式”。既继承了传统控制线路的清晰直观，又考虑到大多数工厂企业电气技术人员的读图习惯及编程水平，所以非常容易接受和掌握。梯形图语言的编程元件的符号和表达方式与继电器控制电路原理图相当接近。通过阅读PLC的用户手册或短期培训，电气技术人员和技术工很快就能学会用梯形图编制控制程序。同时还提供了功能图、语句表等编程语言
YASKAWA YASNAC EXPANSION BOARD JARCR-XEB01-1, JARCR-XEB01-2, MARIO
ALLEN BRADLEY DRIVE 1336VT-B050-EOS-L3 REPAIR SERVICE
RATHGEBER TRANSFORMER ET 320
SELCA CONTROLLER CARD SE503 P
VICKERS COMM BOARD PCB-FSC
ALLEN BRADLEY DRIVE 1336-C020-EOE-FA2
MODICON CONTROLLER
FANUC AC SERVO MOTOR A06B-0314-B072
FANUC SERVO MOTOR A06B-0512-B001
DRIVECON DRIVE VE 5148HG-30
FANUC CONTROLLER CARD A87L
DANFOSS BOARD VARISPEED 180
SANYO DENKI AC SERVO SYSTEMS QS1E03AA-01
BOSCH SERVO MOTOR SF-A
REXROTH AMPLIFIER BOARD VT50XX
INDRAMAT SERVO MOTOR MDD093C-N-030-N2M-110GA2
CMC PM SERVO MOTOR MEH (ENCODER: 21DML37AS)
WESTINGHOUSE AB DE-ION CIRCUIT INTERRUPTER FA3015SM
ALLEN BRADLEY AC OUTPUT MODULE 1771-ASB/B
SIEMENS SERVO MOTOR 1FK7063-5AF71-1GH2
EATON TRANSFER SWITCH MODULE ATC-300
ALLEN BRADLEY DRIVE 1336VT-B020-EAP-L3
FANUC AC SERVO MOTOR A06B-0502-B754
ALLEN BRADLEY DRIVE 1336-B015-EJE-L3
INDUSTRIAL DRIVES SERVO MOTOR BRBA
CUTLER HAMMER DRIVE SVX015A1-5A4N1
PARKER SERVO MOTOR MPM892ASG7G1N
INDRAMAT PERMANENT MAGNET MOTOR,MKD071B-035-GG1-KN
BOSCH SERVO DRIVE VM60/EB-TA
SIEMENS SERVO MOTOR 1FK7100-5AF71-1GA0
YASKAWA ELECTRIC SERVOMOTOR SGMD-22AWA-YR13
ALLEN BRADLEY DRIVE 1336S-B040-AN-EN
HEIDENHAIN ENCODER ROD
FANUC SERVO MOTOR A06B-0513-B005
SEIDAL SERVO MOTOR SM 71 K 3000
GPD 333 MAGNETEK DRIVE DS044
ALLEN BRADLEY AC OUTPUT MODULE 1771-ASB/B
ISOLATED ANALOG INPUT MODULE *AS IT IS* 1771-IL C
SIEMENS SERVO MOTOR 1FK7083-5AF71-1EG5
SIEMENS DRIVE 6SC6612-0CA01
INDRAMAT SERVO DRIVE KDAAP0-U1